Austrian Airlines flight OS-472 had to divert for an emergency landing in Salzburg, Austria, on December 9th.
According to the airline, the plane heading from Basel, Switzerland, to Vienna, Austria, was diverted due to an engine oil pressure indication.
The plane landed safely. There were 74 passengers and 4 crew members aboard at the time; all of them remained unharmed.

Xiamen Airlines flight MF-8411 made an emergency landing in Lhasa, China, on October 25th.
Air Transport International flight 8C-3750 had to return and make an emergency landing in Sacramento, California, on October 6th.
BoA Boliviana de Aviacion flight OB-670 had to return and make an emergency landing at El Alto International Airport, La Paz, Bolivia, on September 22nd.
Thomas Cook Airlines flight MT-2718 had to return and make an emergency landing in Manchester, England, on April 15th.